Squashed 'third_party/ceres/' content from commit e51e9b4
Change-Id: I763587619d57e594d3fa158dc3a7fe0b89a1743b
git-subtree-dir: third_party/ceres
git-subtree-split: e51e9b46f6ca88ab8b2266d0e362771db6d98067
diff --git a/internal/ceres/file.cc b/internal/ceres/file.cc
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+// Ceres Solver - A fast non-linear least squares minimizer
+// Copyright 2015 Google Inc. All rights reserved.
+// http://ceres-solver.org/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors may be
+// used to endorse or promote products derived from this software without
+// specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: keir@google.com (Keir Mierle)
+//
+// Really simple file IO.
+
+#include "ceres/file.h"
+
+#include <cstdio>
+#include "glog/logging.h"
+
+namespace ceres {
+namespace internal {
+
+using std::string;
+
+void WriteStringToFileOrDie(const string &data, const string &filename) {
+ FILE* file_descriptor = fopen(filename.c_str(), "wb");
+ if (!file_descriptor) {
+ LOG(FATAL) << "Couldn't write to file: " << filename;
+ }
+ fwrite(data.c_str(), 1, data.size(), file_descriptor);
+ fclose(file_descriptor);
+}
+
+void ReadFileToStringOrDie(const string &filename, string *data) {
+ FILE* file_descriptor = fopen(filename.c_str(), "r");
+
+ if (!file_descriptor) {
+ LOG(FATAL) << "Couldn't read file: " << filename;
+ }
+
+ // Resize the input buffer appropriately.
+ fseek(file_descriptor, 0L, SEEK_END);
+ int num_bytes = ftell(file_descriptor);
+ data->resize(num_bytes);
+
+ // Read the data.
+ fseek(file_descriptor, 0L, SEEK_SET);
+ int num_read = fread(&((*data)[0]),
+ sizeof((*data)[0]),
+ num_bytes,
+ file_descriptor);
+ if (num_read != num_bytes) {
+ LOG(FATAL) << "Couldn't read all of " << filename
+ << "expected bytes: " << num_bytes * sizeof((*data)[0])
+ << "actual bytes: " << num_read;
+ }
+ fclose(file_descriptor);
+}
+
+string JoinPath(const string& dirname, const string& basename) {
+#ifdef _WIN32
+ static const char separator = '\\';
+#else
+ static const char separator = '/';
+#endif // _WIN32
+
+ if ((!basename.empty() && basename[0] == separator) || dirname.empty()) {
+ return basename;
+ } else if (dirname[dirname.size() - 1] == separator) {
+ return dirname + basename;
+ } else {
+ return dirname + string(&separator, 1) + basename;
+ }
+}
+
+} // namespace internal
+} // namespace ceres